linux-kernel - Re: [PATCH v4 3/4] locking/qspinlock: Add ARCH_USE_QUEUED_SPINLOCKS

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Date:   Wed, 7 Apr 2021 15:34:27 +0100
From:   Christoph Hellwig <hch@...radead.org>
To:     Christoph M??llner <christophm30@...il.com>
Cc:     Christoph Hellwig <hch@...radead.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Guo Ren <guoren@...nel.org>,
        linux-riscv <linux-riscv@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-csky@...r.kernel.org,
        linux-arch <linux-arch@...r.kernel.org>,
        Guo Ren <guoren@...ux.alibaba.com>,
        Will Deacon <will@...nel.org>, Ingo Molnar <mingo@...hat.com>,
        Waiman Long <longman@...hat.com>,
        Arnd Bergmann <arnd@...db.de>, Anup Patel <anup@...infault.org>
Subject: Re: [PATCH v4 3/4] locking/qspinlock: Add
 ARCH_USE_QUEUED_SPINLOCKS_XCHG32

On Wed, Apr 07, 2021 at 04:29:12PM +0200, Christoph M??llner wrote:
> Gentlemen, please rethink your wording.
> RISC-V is neither "crap" nor a "trainwreck", regardless if you like it or not.

No, by all objective standards the RISC-V memory model and privileged
architecture is a trainwreck.  Anyone who disagrees is way out there in
the sky.